Why hasn't their been a huge nuclear disaster?

More context please

Explanation:

Unless you asking that generally then it's because it would cause A massive cold war and well you can imagine that would be bad for weaker countries

The Treaty on the Prohibition of Nuclear Weapons was renewed a few months ago I believe, so nuclear disaster would be incapable of occurring until it ends, if it does. Because the countries might decide to keep renewing it, in order to keep peace. Though another reason would be because we are advancing in technology so over time there would be less occurrences as such of the Chernobyl Incident.

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

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